Fine. Although I'd love to see how you go using the stairs to climb a sixteen storey building.
i do it every day: my apartment is on the 12th
How many times? I can see some poor ensign starting his shift in engineering, then taking a report to the bridge, then going down to the shuttlebay , then going to the cargo bay to get a spare part, back to the shuttle bay, then down to engineering to report to the chief engineer, then back to the shuttlebay, off to a lab...
I bet you walk down your 12 flights once when you leave, then again when you come back.
And also, how long does it take yo to walk up 12 floors? Would you really want to take that long to deliver a report to the bridge, or would it be better to use a lift?